In this paper, for even \(n\)  qubits we have established four SLOCC equations
and constructed four SLOCC polynomials of degree \(2^{n/2}\) . For \(n=4\) , the
SLOCC polynomials of degree \(2^{n/2}\)  reduce to the polynomials of degree 4
in [1]}. For \(n\ge 6\) , the four SLOCC polynomials are linearly
independent. The SLOCC equations can be exploited for SLOCC classification
of any even \(n\)  qubits. In light of the SLOCC equations, we have proposed
several different genuine SLOCC entanglement classes of even \(n \)  qubits and
showed that they are inequivalent to the \(|GHZ\rangle \) , \(|W\rangle \) , or \(|l,n\rangle \)  (the symmetric Dicke states with \(l\)  excitations) via the
vanishing or not of the polynomials.
